I honestly like the black stitching. I think it helps him stand out from the background. But of course it's hard for me to visualize green. You could always try the green and see if you like it, and whichever one doesn't win could stay for your coop (that's what I have done with mine), but even if you don't do that I would be happy to receive the little guy with black stitching.
Cheers!
Rachel